gh-110941: Fix json.dump encoding dict subclasses as empty.
#287939
| Job | Run time |
|---|---|
| 7s | |
| 4s | |
| 11s |
json.dump encoding dict subclasses as empty.
#287939
| Job | Run time |
|---|---|
| 7s | |
| 4s | |
| 11s |